SAE-50.4 - Sundown Audio 4-Channel 300W RMS Class AB Full Range Amplifier High Efficiency Multi-Channel Design RMS Power 4-Ohm Bridge: 150W x 2 RMS Power 2-Ohm Stereo: 75W x 4 RMS Power 4-Ohm Stereo: 50W x 4 Input Sensitivity: 6 - 0.2 Volts